<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        align-center
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTableLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action图片要上传到的后台api地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor
              ref="myQuillEditor"
              v-model="addForm.goods_introduce"
            />
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
            <!-- Or manually control the data synchronization -->
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%"
      @close="previewClosed"
    >
      <img :src="previewPath" alt="" class="previewPic" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
import { getGoodsCateDataListAPI, getParamsListAPI, addGoodsAPI } from '@/api'
export default {
  data() {
    return {
      // 步骤条激活的步骤
      activeIndex: '0',
      //添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: '',
        pics: [],
        goods_introduce: '',
        attrs: [],
      },
      //添加商品的表单数据验证规则对象
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
      },
      //商品分类列表
      cateList: [],
      //级联选择器props属性
      cascaderProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      //态参数列表数据
      manyTableData: [],
      //静态属性列表数据
      onlyTableData: [],
      // 图片上传的地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 上传图片请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      // 上传图片预览事件图片地址
      previewPath: '',
      // 控制上传图片预览对话框的显示与隐藏
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获得分类列表
    async getCateList() {
      const { data: res } = await getGoodsCateDataListAPI()
      //   const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类失败！')
      this.cateList = res.data
      //   console.log(this.cateList)
    },
    // 级联选择器选中项变化触发
    handleChange() {
      //   console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) this.addForm.goods_cat = []
    },
    // tab栏切换判定事件处理函数
    beforeTableLeave(activeName, oldActiveName) {
      //   console.log(activeName)
      //   console.log(oldActiveName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // tab 被选中时触发
    async tabClicked() {
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await getParamsListAPI(this.cateId, {
          sel: 'many',
        })
        if (res.meta.status !== 200)
          return this.$message.error('获取动态参数列表失败！')
        // console.log(res)
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        // 证明访问的是静态属性面板
        const { data: res } = await getParamsListAPI(this.cateId, {
          sel: 'only',
        })
        if (res.meta.status !== 200)
          return this.$message.error('获取静态属性列表失败！')
        // console.log(res)
        // res.data.forEach((item) => {
        //   item.attr_vals =
        //     item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        // })
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中，找到这个图片对应的索引值
      const index = this.addForm.pics.findIndex((x) => x.pic === filePath)
      // 3.调用数组的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(index, 1)
      // console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // console.log(response)
      // 1.拼接得到一个图片信息对象
      // 2.将图片信息对象，push到pics数组中
      const picInfo = {
        pic: response.data.tmp_path,
      }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 监听上传图片预览对话框的关闭事件
    previewClosed() {
      this.previewVisible = false
    },
    // 富文本添加商品按钮触发函数
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写必要的表单项')
        // 发送添加商品的请求
        // 将提交表单的格式调整为与接口文档一致 goods_cat转换为字符串
        // 由于级联选择器需要使用到的goods_cat为数组，而请求的数据要求是字符串，产生了不可调解的矛盾，此时我们需要将上传的数据做一次深拷贝，再操作深拷贝后的数据并提交 需要用到lodash组件提供的cloneDeep（obj）方法
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //发送添加商品的参数attrs数据修改
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        const { data: res } = await addGoodsAPI(form)
        console.log(res)
        if (res.meta.status !== 201)
          return this.$message.error('添加商品失败！')
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-checkbox-group {
  margin: 0 10px 0 0 !important ;
}
.previewPic {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>